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Finding the Fourth Proportional to 640.27, 960.08 and 293.69

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Solution

The fourth proportional to 640.27, 960.08 and 293.69 is: 440.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    640.27 : 960.08 = 293.69 : x
  2. Step 2: Convert to fraction form
    640.27/960.08 = 293.69/x
  3. Step 3: Cross multiply
    640.27x = 960.08 × 293.69
  4. Step 4: Simplify right side
    640.27x = 281,961.09
  5. Step 5: Solve for x
    x = 281,961.09/640.27
  6. Step 6: Final answer
    x = 440.38

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.